Road scarifier



Patented Aug. 14, 1934 UNITED Y srArss P Arent' cerises 7 ROAD SCARIFIER Maillon D. York and Paul J. Newton, Unaailla, N. Y., assignors to York Modern Corporation, Unadilla,vN. Y., a corporation of New York Application December 8, 1932, Serial No. 646,281

11 Claims.

cally to compensate for wear and also to the construction of the tooth.

In machines of this character, the teeth are mounted in a straight row upon a supporting frame which, in turn, is mounted upon the main frame of the machine to extend transversely thereof and in such manner that it may be moved vertically to bring the lower ends oi its teeth into and out of cutting engagement with theground.

Each tooth is provided with a vertically adjustable supporting member coaxial therewith, and one of the objects of the invention is to provide means whereby the tooth may be detachably coupled to its supporting member to move verfio tically therewith and to enable the tooth to be detached therefrom for replacement when necessary.

Another object is to mount each tooth holder and its supporting member in a suitable guide sleeve and to secure the guidesleeve in an opening in the frame by releasable means in such manner that it, together with the tooth and supporting member,` may be removed from the machine independently of the other tooth holders.

A further object is to make each tooth of triangular cross section and to arrange it with one of its fiat sides facing in. the direction of movement of the machine so as to render the.l cutting end of the tooth self-sharpening as it wears by contact with the ground.

Other Vobjects and uses relating to specific parts of the machine will be brought out in the Figure 4, is an enlarged detail horizontal sectional view taken on line yLime, Figure 2.

Y Figure 5 is an enlarged top plan of a fragmentary portion ofv the tooth. supporting frame showing more particularly the means for rotating one of the nuts by which the tooth supporting member and tooth may be adjusted vertically.

Figure 6 is a detail vertical sectional View taken on line 6 6, Figure 5, showing a portion of the screw supporting member for one of the teeth, partly in elevation and partly broken away.

VFigure 'l is a detail sectional View, partly in elevation, showing the adjacent ends of the tooth and screw detached, the upper end of the tooth being shown by dotted lines as inserted in thesocket in the adjacent end of the screw,

In order that the invention may be clearly understood, we have shown a tooth supporting frame comprising an elongated bar 1 adapted to be mounted in any suitable manner upon the frame of the machine for vertical movement to bring its teeth into and out of engagement Awith the ground and for this latter purpose thel bar 1 is provided with longitudinally spaced rear wardly projecting lugs 2l having apertures 3 for receiving suitable suspension rods lsimilar to those shown in the pending application referred to.

This bar 1 is also provided with forwardly projecting pairs of lugs 5l' and 4', those of each pair being spaced a suflicient vdistance apart to receive between them a pair of draft bars or braces 5 similar to those shown in the pending application and shown by dotted lines in Figure 1 o The bar 1 is also provided with a multiplicity of vertical guide openings 6 arranged in a straight rowV in uniformly spaced relation length- `Each of the openings 6 is preferably angular Y or square in cross section and of uniform area from bottom vto top, while each Yof the sleeves '7 is provided with a shank 7' which is alsofangular or square incross section and is inserted in the opening 6 with an easily sliding t so that when in operative position,.it will be held against angular movement about its axis, the upperend face of the sleeve being substantially coincident with the corresponding upper face ofthe bar 1, as shown more clearly in Figure 2. Y y

' The lower end of each sleeve '7 belowvthe lowe facevoi the bar l is preferably tapered downwardly and provided with a vertical guide opensides facing forwardly or in the direction of l propulsion of the machine so that as their lower ends wear away by contact with the ground theyY will be self-sharpening through such wear by Areason of the fact that the apex of the cutting point of each tooth will wear away faster than the forwardly facing broad sides thereof.

Each sleeve is also provided with a rearwardly projecting shoulder 10 a distance from the upper end face thereof corresponding to the vertical depth of the frame 1 so that when the shoulder 10 engages the lowerfface of the frame, the

upper end face of the sleeve will be substantially coincident with the corresponding upper face of the frame bar 1, exceptthat the upper end of the' sleeve is provided near one of its corners with an upwardly projecting threaded boss or stud 1l which extends through an opening 12 l in an overlying bar 13, as shown more clearly 3()r iii-Figures 2 and 6. the upper end of the stud 11 being engaged by a nut 14 which also engages the upper face of the bar 13 for clamping the same to the upper face of the frame 1.

The clamping bar 13 is angular in cross section and has its upper flange secured to the top face of the frame 1 by means of the threaded studs 11A and their` corresponding nuts 14 constituting releasable means for holding the clamping bar 13 in operative position, it being understood that the upperY flange of the clamping bar also engages the upper end face of the sleeve 7, as shown more clearly in Figures 2, 5 and 6.

The sleeve 7 is provided with a vertical opening 15 therethrough having its lower end reduced to form the guide opening 8 for the tooth A9 and its upper end enlarged to form a cylindrical socket 16 in which is journaled a rotary'cylindrical member 17 having a central threaded opening 18 therethrough.

The lower end of the rotary member 17 normally rests upon the lower end wall 16 of the socket 16 and has its upper end extended above the upper end face of the sleeve and provided with a pinion 19 of less diameter than the cylindrical socket 17 to permit the sleeve and parts carried thereby to be withdrawn downwardly from the opening '6 when the nut '14 is removed from the corresponding stud 11.

The central threaded opening 18 of each rotary' member 17 is engaged by an uprightscrew 20 whichconstitutes the support for the adjacent ltooth 9 and is adapted to be moved vertically for eifecting a corresponding vertical move- .ment ofthe tooth by the rotation of the nut 17 in a manner presently described.

.'Ihe'rear edge ofthe upper horizontal'iiange Aof thefclarnping bar 13 kis arranged .to overlie the adjacent portion of the upper end of the 'pinions 19 to cooperate with the shoulders 16' for haldingv the rotary member or nut 14 against aial movement relatively to the sleeve 7.

.Releasablemeans is provided for detachably coupling each tooth 9 to its'corresponding supporting lmember 26 and for this purpose'jthe lower end ofthe tooth-supportingscrew is provided with a socket 21, the upper end of which is slightly larger than'the lower end to form what may be termed a ball socket while the upper end of the tooth 9 is provided with a ball 22 which is split longitudinally at 22 to form opposite yielding jaws.

These jaws are normally tensioned to spring outwardly so that when engaged in the socket 21 they will hold the tooth and its supporting screw 20 against relative axial movement whereby the vertical adjustment of the screw will effect acorr'esponding vertical adjustment of the tooth to compensate for wear.

On the other hand, the jaws are sufficiently resilient to permit the tooth and its supporting bar to be withdrawn one from the other, as for example, to permit replacement of the tooth when necessary. Y

It isnow clear that the rotation of any one of the members 17 in its corresponding bearing 16 inv one direction`or the other will effect` a vertical adjustment of the screw 20 and corresponding vertical adjustment of the tooth 9.

It is desirable, however, to adjust all of the teeth simultaneously in the same direction to compensate for wear and for this purpose a plurality of spur gears 23, one for each of the pinions 19, are journaled in suitable bearings 24 in the upper side or" the frame 1 to mesh with their corresponding pinions 19, Vthe upper ends of said gears being provided with bevel pinions 25.

A shaft 26 isjournaled in suitable4 bearings 27 on the upperA side of the frame 1 to extend lengthwise thereof across the upper ends of the pinions 25,' as shown more clearly in Figures 1,K 2 and 5, said shaft being provided with a plurality of bevel gears 28 meshing with the corresponding bevel gears 25 for transmitting rotary motion to the gears 23 and rotary members 17 when the shaft 26 is rotated in one direction or the other.

As illustrated, the portions of the shaft 26 engaged by the bevel gears 28 are angular or square in cross section for engaging in corresponding apertures in the gears which latter may be held against axial movement along the shaft by releasable means such as set screw 29.

This shaft 26 may be rotated by any suitable means but preferably at will, and for this purpose is provided at one end with a hand wheel 30.

The teeth 9 are all of substantially the same length sufficient to extend some distance above and below their respective guide openings 8 and when they are initially set to their operative positions, the lower ends of the screws 20 will be some distance above the upper ends of the guides 8 kwhile the upper ends of the screws. will extend a corresponding distance above the upper ends of their respective nuts 17, thus permitting the teeth to be adjusted downwardly a similar distance to compensate for wear.

In order to prevent the rotation of the screws '20 during the rotation of their corresponding nuts 17, each screw is provided in one sidewith a lreyway k31 engaged by a corresponding key4 32 on the inner edge of the adjacent portion of the clampingbar 13,` as shown more clearly in Figure 5, thus permitting the several screws and angular cross sectional construction and similar construction-of their respectivev guide openings 8.

theirvrespective teeth to be moved axially in opi.

It is now clear that each sleeveY 7, together with the correspondingscrew 2o and nut 17, constitutes what may be termed a tooth supporting unit and that the several units together with the clamping plate 13` are secured inl place upon the frame 1 by the same clamping means such as the studs 11 and nuts 14.

If any one of the nuts 14 is removed, the corresponding tooth supporting unit may be withdrawn downwardly andk outwardly from its corresponding opening 6 and thereby displaced from the frame independently of the other units.

0n the other hand, in case it should be desired to replace any one of the teeth it may be withdrawn downwardly from its corresponding socket 21 in the lower end of the adjacent screw by reason of the fact that the opposite jaws of the ball 22 are yielding, and, in reverse manner, a new tooth may be replaced in the socket by forcing its ball endwise thereinto.

In case it should be necessary to adjust any one of the teeth 9 axially, it is simply necessary to loosen the set screw 29 of the corresponding tooth and withdraw the adjacent gear ing the screw 2G and its tooth 9 axially in either 3 direction.

Although we have shown and described a ball and socket coupling for connecting each tooth to its corresponding screw, it is evident that other forms of couplings may be employed without departing from the spirit of the invention.

Operation When the teeth 9 are assembled in their respective holding units, the latter may be upon the frame, the pinions 19 will be brought into engagement with their respective pinions 23 which have been previously installedl upon the tooth supporting frame 1 in the manner shown in Figures 1, 2 and 3.

Each screw is preferably provided with a right hand thread so that if it is desired to move the tooth downwardly to compensate for wear, it will be necessary to rotate the shaft 26 in a direction in such manner as to cause the rotation of the nuts 1'? in a counterclockwise direction indicated by the arrows in Figure 5, the reverse rotation serving to move the teeth upwardly.

The construction of the tooth holding unitsV and the means for operating the teeth and all of the units simultaneously, is particularly simple, practical and efficient and together with the fact that any one of the units may be displaced independent of theother units and that each tooth may be replaced upon its corresponding supporting screw 20 constitute important features of the invention, but obviously the construction shown may be modified materially without departing from the spirit of the invention. i

`l.` In a scarier,` a tooth-supporting frame, a plurality of upright guides mounted on vthe frame, upright teeth movablealong said guides, and means including vertioallymovable membersco-axial with the teeth for simultaneously adjusting the teeth along their guides to compensate for wear.

2.' 'In a scarier, a tooth-supporting frame, a plurality of upright guides mounted on the frame,1-upright fteeth movable along said guides, a rotary shaft operable at will, and means including vertically movable members co-axial with the teeth and actuated by said shaft for simultaneously adjusting all of the teeth along their respective guides.

3. In a scarifying machine, a tooth holder comprising an upright guide sleeve having a lengthwise opening of angular cross section in one endy and a journal bearing in its other end, a tooth of angular cross section slidable endwise in said opening, a screw coupled to the upper end of the tooth, means for holding the screw against rotation, a nut engaging the screw, means for holding the nut against axial movement, and means for rotating the nut for moving the screw and tooth lengthwise of the guide sleeve.

Il. In a scarifying machine, a frame having an upright guide, a tooth-adjusting member movable along the guide, a scarier tooth detachably coupled to said member co-axial therewith, and means for adjusting said member with the tooth thereon along the guide.

5. In a scarifying machine, a frame, an upright guide, releasable means for securing the guidcto the frame, a tooth adjustable along the guide, and means including a nut and screw for adjusting the tooth.

6. In a scarifying machine, a frame, a sleeve secured in an opening in the frame to extend downwardly therefrom, a tooth movable endwise in the sleeve, a screw coaxial with and operatively connected to the tooth for moving the latter endwise, a nut engaging the screw, and means for rotating the nut for moving the screw and 'tooth endwise.

7. In a scarifying machine, a sleeve, a screw movable endwise in the sleeve, a tooth connected to the screw co-axial therewith, and a rotary nut journaled on the sleeve and engaged with the screw for moving said screw and tooth endwise.

8. In a scarier, a horizontal bar adapted to be moved transversely over the ground, toothsupporting members mounted side by side in a straight line upon said bar and each provided with a vertical opening therethrough, teeth mounted in said openings, and teeth-adjusting devices movable inV said openings and operatively connected to their respective teeth co-axial therewith.

Y9. In a scariiier, a horizontal bar adapted to be moved transversely over the ground, toothsupporting members mounted side by side in a straight line upon said bar and each provided with a Vertical opening therethrough, teeth mounted in said openings, teeth-adjusting devices movable in said openings and operatively connected to their respective teeth co-axial therewith, and means for simultaneously operating all of said devices.

10. In a scanner, a horizontal bar adapted to be moved transversely over the ground, toothnok supporting members mounted side by side in a `150 11. In a road-scarier, the combination with V a vehicle frame, of a tooth-supporting member having a vertical opening therethrough, releasable means for securing said member to the frame, a tooth and an adjusting member therefor co-aXial therewith and operatively connected thereto and both movable axially in said opening, and means for adjusting the second member axially for similarly adjusting the tooth.

MAHLON D. YORK. PAUL J. NEWTON. 

